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Article | REF: A3375 V1

Polyethylene terephthalates (PET) for films and sheets

Author: Sándor FÜZESSÉRY

Publication date: April 10, 1997

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1. Chemical synthesis of polymers

The various polyethylene terephthalates are polymers obtained by polycondensation of one or two diacids with one or two diols, according to the following reaction scheme:

It's a balanced reaction: to produce polyester, you need to move in direction (1) with the elimination of water. However, if the polyester is brought to the molten state in the presence of water, the equilibrium shifts in direction (2). Water causes macromolecular chains to break up, leading, among other things,...

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Chemical synthesis of polymers
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